<template>
  <div id="map"></div>
</template>

<script lang="ts" setup>
import { Map, View } from 'ol'
import { Tile as TileLayer } from 'ol/layer'
import { onMounted, onBeforeUnmount } from 'vue'
import { XYZ, TileDebug } from 'ol/source'
import { ATTRIBUTIONS, MAPURL } from '../../constants'

//实例化图层数据源对象
const TiandituSource = new XYZ({
  attributions: ATTRIBUTIONS,
  wrapX: false,
  url: MAPURL
})
let map: Map | null = null
onMounted(() => {
  map = new Map({
    //地图容器div的ID
    target: 'map',
    //地图容器中加载的图层
    layers: [
      //加载瓦片图层数据
      new TileLayer({
        source: TiandituSource
      }),
      //加载瓦片网格图层
      new TileLayer({
        source: new TileDebug({
          //地图投影坐标系
          projection: 'EPSG:3857',
          //获取瓦片图层数据对象（osmSource）的网格信息
          tileGrid: TiandituSource.getTileGrid() || undefined
        })
      })
    ],
    //地图视图设置
    view: new View({
      //地图初始中心点
      center: [12900000, 4900000],
      //地图初始显示级别
      zoom: 8
    })
  })
})

onBeforeUnmount(() => {
  if (map) {
    map.dispose()
    map = null
  }
})
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
#map {
  height: 100%;
  width: 100%;
}
</style>